Kuroha's younger sisters abruptly visit Sueharu's house to tell him that she has developed amnesia. All her memories from summer break onward are gone, and they stop right when she was about to confess to Sueharu. So she suggests starting over from the moment of her own confession and erasing everything she did during the cultural festival. But Kuroha's behavior is making Shirokusa suspicious...
Momosaka Maria? The one from 
The Perfect Little Sister?!
موموساكا ماريا؟ من "الأخت الصّغيرة المثاليّة"؟
Momosaka Maria? Doch nicht etwa die
aus „Die perfekte kleine Schwester“?!
Momosaka Maria?
L'attrice di La sorellina perfetta?!
Momosaka Maria? A que aparece
em A Irmãzinha Perfeita?!